Rosa M. Mérida
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View article: CANUCS/Technicolor Data Release 1: Imaging, Photometry, Slit Spectroscopy, and Stellar Population Parameters*
CANUCS/Technicolor Data Release 1: Imaging, Photometry, Slit Spectroscopy, and Stellar Population Parameters* Open
We present the first data release of the Canadian NIRISS Unbiased Cluster Survey (CANUCS), a JWST Cycle 1 GTO program targeting five lensing clusters and flanking fields in parallel (A370, MACS0416, MACS0417, MACS1149, and MACS1423; survey…
View article: Extreme properties of a compact and massive accreting black hole host in the first 500 Myr
Extreme properties of a compact and massive accreting black hole host in the first 500 Myr Open
Little red dots (LRDs) are a high redshift galaxy population. Despite their high number densities, their nature is still uncertain. Here we present CANUCS-LRD-z8.6, a spectroscopically confirmed little red dot at a spectroscopic redshift o…
View article: Resolved Mass Assembly and Star Formation in Milky Way Progenitors since <i>z</i> = 5 from JWST/CANUCS: From Clumps and Mergers to Well-ordered Disks
Resolved Mass Assembly and Star Formation in Milky Way Progenitors since <i>z</i> = 5 from JWST/CANUCS: From Clumps and Mergers to Well-ordered Disks Open
We present a resolved study of 877 progenitors of Milky Way Analogs (MWAs) at 0.3 < z < 5, selected with abundance matching in the 10 fields of the Canadian NIRISS Unbiased Cluster Survey. Utilizing 18–21 bands of deep NIRCam, NIRISS, and …
View article: A Deep Dive down the Broad-line Region: Permitted O <scp>I</scp> , Ca <scp>II,</scp> and Fe <scp>II</scp> Emission in an Active Galactic Nucleus Little Red Dot at <i>z</i> = 5.3
A Deep Dive down the Broad-line Region: Permitted O <span>I</span> , Ca <span>II,</span> and Fe <span>II</span> Emission in an Active Galactic Nucleus Little Red Dot at <i>z</i> = 5.3 Open
We present a spectroscopic analysis of a broad-line active galactic nucleus (AGN) selected as a little red dot (LRD) at z = 5.3 behind the Bullet cluster (Bz5.3) based on JWST/NIRCam and NIRSpec data. The detection of strong Fe ii , O i , …
View article: The rise and fall of Little Red Dots could be driven by the environment
The rise and fall of Little Red Dots could be driven by the environment Open
The Little Red Dot (LRD) paradigm comprises three main unknowns that are intrinsically connected: (1) What is the nature of these sources? (2) How do they form? (3) How do they evolve? Larger spectroscopic samples and high-resolution data …
View article: Metal-poor Star-forming Clumps in Cosmic Noon Galaxies: Evidence for Gas Inflow and Chemical Dilution Using JWST NIRISS
Metal-poor Star-forming Clumps in Cosmic Noon Galaxies: Evidence for Gas Inflow and Chemical Dilution Using JWST NIRISS Open
The formation and evolution of galaxies are intricately linked to the baryon cycle, which fuels star formation while shaping chemical abundances within galaxies. Investigating the relationship between star formation and metallicity for lar…
View article: Probing the Star Formation Main Sequence down to 10$^{7} M_\odot$ at $1 < z < 9$
Probing the Star Formation Main Sequence down to 10$^{7} M_\odot$ at $1 < z < 9$ Open
The Main Sequence of Star-Forming Galaxies (SFGMS or MS) is a fundamental scaling relation that provides a global framework for studying galaxy formation and evolution, as well as insight into the complex star formation histories (SFHs) of…
View article: CANUCS/Technicolor: JWST Medium-band Photometry Finds Half of the Star Formation at <i>z</i> > 7.5 Is Obscured
CANUCS/Technicolor: JWST Medium-band Photometry Finds Half of the Star Formation at <i>z</i> > 7.5 Is Obscured Open
We present a sample of 110 high-redshift ( z > 7.5) galaxies from the CANUCS and Technicolor surveys, showcasing photometry in every wide- and medium-band NIRCam filter in addition to ancillary Hubble Space Telescope data sampling 0.4–5 μ …
View article: Metal-Poor Star-Forming Clumps in Cosmic Noon Galaxies: Evidence for Gas Inflow and Chemical Dilution Using JWST NIRISS
Metal-Poor Star-Forming Clumps in Cosmic Noon Galaxies: Evidence for Gas Inflow and Chemical Dilution Using JWST NIRISS Open
The formation and evolution of galaxies are intricately linked to the baryon cycle, which fuels star formation while shaping chemical abundances within galaxies. Investigating the relationship between star formation and metallicity for lar…
View article: Earliest Galaxy Evolution in the CANUCS+Technicolor fields: Galaxy Properties at $z\sim10-16$ seen with the Full NIRCam Medium and Broad Band Filters
Earliest Galaxy Evolution in the CANUCS+Technicolor fields: Galaxy Properties at $z\sim10-16$ seen with the Full NIRCam Medium and Broad Band Filters Open
We present a sample of $z_{\rm phot}\sim10-16$ galaxies by exploiting one of the richest JWST NIRCam imaging data, taken in the CANUCS survey in Cycle 1 and the Technicolor (TEC) survey in Cycle 2. The combination of the CANUCS+TEC provide…
View article: Possible environmental quenching in an interacting little red dot pair at <i>z</i> ∼ 7
Possible environmental quenching in an interacting little red dot pair at <i>z</i> ∼ 7 Open
We report the discovery of a z ∼ 7 group of galaxies that contains two little red dots (LRDs) just 3.3 kpc apart, along with three potential satellite galaxies, as part of the Canadian NIRISS Unbiased Cluster Survey (CANUCS). The spectral …
View article: Possible environmental quenching in an interacting little red dot pair at <i>z</i> ∼ 7
Possible environmental quenching in an interacting little red dot pair at <i>z</i> ∼ 7 Open
We report the discovery of a z ∼ 7 group of galaxies that contains two little red dots (LRDs) just 3.3 kpc apart, along with three potential satellite galaxies, as part of the Canadian NIRISS Unbiased Cluster Survey (CANUCS). The spectral …
View article: CANUCS/Technicolor: JWST Medium Band Photometry Finds Half of the Star Formation at $z>7.5$ is Obscured
CANUCS/Technicolor: JWST Medium Band Photometry Finds Half of the Star Formation at $z>7.5$ is Obscured Open
We present a sample of 146 high-redshift ($z>7.5$) galaxies from the CANUCS/Technicolor surveys, showcasing photometry in every wide- and medium-band NIRCam filter in addition to ancillary HST data sampling $0.4-5 μm$ (22 JWST bands out of…
View article: Resolved mass assembly and star formation in Milky Way Progenitors since $z = 5$ from JWST/CANUCS: From clumps and mergers to well-ordered disks
Resolved mass assembly and star formation in Milky Way Progenitors since $z = 5$ from JWST/CANUCS: From clumps and mergers to well-ordered disks Open
We present a resolved study of 877 progenitors of Milky Way Analogs (MWAs) at $0.3
View article: Red, hot, and very metal poor: extreme properties of a massive accreting black hole in the first 500 Myr
Red, hot, and very metal poor: extreme properties of a massive accreting black hole in the first 500 Myr Open
The James Webb Space Telescope (JWST) has recently discovered a new population of objects at high redshift referred to as `Little Red Dots' (LRDs). Their nature currently remains elusive, despite their surprisingly high inferred number den…
View article: The effect of mass and morphology on the mass assembly of galaxies
The effect of mass and morphology on the mass assembly of galaxies Open
The pace at which galaxies grew into their current stellar masses and how this growth is regulated is still not fully understood, nor is the role that morphology plays in this process. We applied full spectral fitting techniques with pyPip…
View article: Measuring the gas reservoirs in 10<sup>8</sup> < <i>M</i><sub>⋆</sub> < 10<sup>11</sup> <i>M</i><sub>⊙</sub> galaxies at 1 ≤ <i>z</i> ≤ 3
Measuring the gas reservoirs in 10<sup>8</sup> < <i>M</i><sub>⋆</sub> < 10<sup>11</sup> <i>M</i><sub>⊙</sub> galaxies at 1 ≤ <i>z</i> ≤ 3 Open
Context. Understanding the gas content in galaxies, along with its consumption and replenishment, is vital to our grasp of the evolution of the Universe. Numerous studies have addressed this notion, utilizing various observational tools an…
View article: Measuring the gas reservoirs in $10^{8}<$ M$_\star<10^{11}$ M$_\odot$ galaxies at $1\leq z\leq3$
Measuring the gas reservoirs in $10^{8}<$ M$_\star<10^{11}$ M$_\odot$ galaxies at $1\leq z\leq3$ Open
Understanding the gas content in galaxies, its consumption and replenishment, remains pivotal in our comprehension of the evolution of the Universe. Numerous studies have addressed this, utilizing various observational tools and analytical…
View article: Life beyond 30: Probing the −20 < M <sub>UV</sub> < −17 Luminosity Function at 8 < z < 13 with the NIRCam Parallel Field of the MIRI Deep Survey
Life beyond 30: Probing the −20 < M <sub>UV</sub> < −17 Luminosity Function at 8 < z < 13 with the NIRCam Parallel Field of the MIRI Deep Survey Open
We present the ultraviolet luminosity function and an estimate of the cosmic star formation rate density at 8 < z < 13 derived from deep NIRCam observations taken in parallel with the MIRI Deep Survey of the Hubble Ultra Deep Field (HUDF),…
View article: Probing the Star Formation Main Sequence Down to 10<sup>8</sup> M <sub>⊙</sub> at 1.0 < z < 3.0
Probing the Star Formation Main Sequence Down to 10<sup>8</sup> M <sub>⊙</sub> at 1.0 < z < 3.0 Open
We investigate the star formation main sequence (MS; SFR– M ⋆ ) down to 10 8−9 M ⊙ using a sample of 34,061 newly discovered ultrafaint (27 mag ≲ i ≲ 30 mag) galaxies at 1 < z < 3 detected in the GOODS-N field. Virtually none of these gala…
View article: Probing the Star Formation Main Sequence down to $10^{8}$ M$_\odot$ at $1.0
Probing the Star Formation Main Sequence down to $10^{8}$ M$_\odot$ at $1.0 Open
We investigate the star formation main sequence (MS) (SFR-M$_{\star}$) down to 10$^{8-9}\mathrm{M}_\odot$ using a sample of 34,061 newly-discovered ultra-faint ($27\lesssim i \lesssim 30$ mag) galaxies at $1\sim28.2$ mag, $\sim27.9$ mag), …
View article: CEERS Key Paper. IV. A Triality in the Nature of HST-dark Galaxies
CEERS Key Paper. IV. A Triality in the Nature of HST-dark Galaxies Open
The new capabilities that JWST offers in the near- and mid-infrared (IR) are used to investigate in unprecedented detail the nature of optical/near-IR-faint, mid-IR-bright sources, with HST-dark galaxies among them. We gather JWST data fro…
View article: Life beyond 30: probing the -20
Life beyond 30: probing the -20 Open
We present the ultraviolet luminosity function and an estimate of the cosmic star formation rate density at $88$ galaxy candidates based on their dropout nature in the F115W and/or F150W filters, a high probability for their photometric re…
View article: Probing the Earliest Phases in the Formation of Massive Galaxies with Simulated HST+JWST Imaging Data from Illustris
Probing the Earliest Phases in the Formation of Massive Galaxies with Simulated HST+JWST Imaging Data from Illustris Open
We use the Illustris-1 simulation to explore the capabilities of the Hubble Space Telescope (HST) and James Webb Space Telescope (JWST) data to analyze the stellar populations in high-redshift galaxies, taking advantage of the combined dep…
View article: Life beyond 30: probing the $-20<M_\mathrm{UV}<-17$ luminosity function at $8<z<13$ with the NIRCam parallel field of the MIRI Deep Survey
Life beyond 30: probing the $-20<M_\mathrm{UV}<-17$ luminosity function at $8<z<13$ with the NIRCam parallel field of the MIRI Deep Survey Open
International audience
View article: CEERS Key Paper V: A triality on the nature of HST-dark galaxies
CEERS Key Paper V: A triality on the nature of HST-dark galaxies Open
The new capabilities that JWST offers in the near- and mid-infrared (IR) are used to investigate in unprecedented detail the nature of optical/near-IR faint, mid-IR bright sources, HST-dark galaxies among them. We gather JWST data from the…
View article: Lack of influence of the environment in the earliest stages of massive galaxy formation
Lack of influence of the environment in the earliest stages of massive galaxy formation Open
We investigate how the environment affects the assembly history of massive galaxies. For that purpose, we make use of SHARDS and HST spectro-photometric data, whose depth, spectral resolution, and wavelength coverage allow to perform a det…
View article: Probing the earliest phases in the formation of massive galaxies with simulated HST+JWST imaging data from Illustris
Probing the earliest phases in the formation of massive galaxies with simulated HST+JWST imaging data from Illustris Open
We use the Illustris-1 simulation to explore the capabilities of the $\textit{Hubble}$ and $\textit{James Webb Space Telescope}$ data to analyze the stellar populations in high-redshift galaxies, taking advantage of the combined depth, spa…